CO Tolerance of Commercial Pt and PtRu Gas Diffusion Electrodes in Polymer Electrolyte Fuel Cells

被引：28
|
作者：
Hajbolouri, F. [1 ]
Andreaus, B. [1 ]
Scherer, G. G. [1 ]
Wokaun, A. [1 ]
机构：
[1] Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland
来源：
FUEL CELLS | 2004年 / 4卷 / 03期
关键词：
CO Poisoning; PtRu Anode; AC-Impedance Spectroscopy; Polymer Electrolyte Fuel Cell; Gas Diffusion Electrode;
D O I：
10.1002/fuce.200400021
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The CO tolerance of commercial Pt and PtRu anode electrodes from different suppliers (E-Tek and Tanaka) has been examined in polymer electrolyte fuel cells (PEFC) using AC-impedance spectroscopy along steady-state current-voltage curves. A simple. mathematical model has been derived in order to extract important kinetic parameters for CO poisoning on different anode electrodes. The Tanaka PtRu (40:60) electrode demonstrated the best CO tolerance under the selected operating conditions. Inductive behavior in the low frequency region of the impedance spectra for the E-Tek Pt and PtRu electrode proved to be characteristic for CO poisoning. However, the impedance spectra of the Tanaka PtRu electrode did not show any inductive behavior and its CO surface coverage, extracted by fitting the experimental data to the model, was lower than the surface CO coverage of the E-Tek electrodes.
引用
收藏
页码：160 / 168
页数：9
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